In Spark Scala, bothfilterandwherefunctions are used to filter data in RDDs and DataFrames respectively. While they perform the same operation, there are a few differences between them. Filter vs Where filterandwhereare used interchangeably to filter data in Spark Scala, but they have some diff...
在Scala中,我们可以使用Monocle库的Optional类型来实现部分镜头。下面是一个使用Optional定义的例子:import monocle._ case class Address(street: String, city: String) case class Person(name: String, age: Int, address: Option[Address]) val addressLens: Optional[Person, Address] = GenLens[Person](_...